|Definition:||A term or phrase representing the primary topic(s) on which a work is focused.|
|Comment:||"subject" is a wrapper tag that binds together subelements. If the subject is a controlled heading from an authoritative list, use the authority attribute to indicate the authority. If it is not desired to parse the subject subelements, use "subject" "topic" and a string. If no authority attribute is present, the data is assumed to be an uncontrolled term. Repeat the subject for each subject string.|
Application: "topic" is used as the tag for any topical subjects that are not appropriate in the "geographic", "temporal", "titleInfo", or "name" subelements. If there is an uncontrolled term, "topic" is used (since "subject" is a binding element). "topic" is equivalent to MARC 21 fields 650 and 6XX subfields $x and $v (with authority attribute defined) and MARC 21 field 653 with no authority attribute.
Note that form subdivisions in LCSH are coded as "topic" because it was felt that the distinction was too difficult to make.geographic
Application: "geographic" is used for geographic subject terms that are not parsed as hierarchical geographics. If the geographic name is part of a corporate body (i.e., United States. Senate), it is coded as "name", not "geographic". "geographic" is equivalent to MARC 21 field 651 and 6XX subfield $z.temporal
Application: "temporal" is used for chronological subject terms or temporal coverage. It may be expressed as a controlled subject term or as a structured date using the same data definition as MODS dates. "temporal" is equivalent to MARC 21 fields 045 and 6XX subfield $y.titleInfo
Application: "titleInfo" includes a title used as a subject. All subelements and attributes used under the top-level element "titleInfo" may be used with this subelement. An authority attribute may also be used at this level if desired, in addition to at the highest level (under "subject"). Equivalent to MARC 21 field 630.name
Application: "name" includes a name used as a subject. All subelements and attributes used under the top-level element "name" may be used. An authority attribute may also be used at this level if desired in addition to at the highest level (under "subject"). Equivalent to MARC 21 fields 600, 610, 611.genre
Application: "genre" includes a genre or form used as part of a subject string when the subject authority distinguishes subdivisions of the main subject (e.g. LCSH). If describing the genre of a resource as a whole, use in the "genre" element. This is used to facilitate mapping between subject authorities that use form subdivisions. Equivalent to subfield $v in MARC 21 6XX fields.hierarchicalGeographic
Definition: A geographic name given in a hierarchical form relating to the resource.
Application: "hierarchicalGeographic" includes a hierarchical form of place name which is both readable by humans and parsable by machines. This form can be applied to the degree of specificity that is known or relevant and used to generate browsable hierarchies even when values are specified to different levels. Explicit inclusion of the complete hierarchy is of potential benefit for automated consultation of a gazetteer to derive map coordinates or to support a map-based interface for searching by country or state. It is equivalent to MARC 21 field 752.
Application: "cartographics" is a wrapper element that includes cartographic data indicating spatial coverage. It is equivalent to MARC 21 fields 034 and 255. If desired, cartographic elements may be bound together with a geographic name (hierarchical or otherwise) within a "subject" element.
Application: "geographicCode" includes a geographic area code associated with a resource. It is equivalent to MARC 21 field 043.
A geographic code that represents the same entity as a term in "geographic" is included within the same "subject" element.
Application: "occupation" includes a term that is descriptive of the occupation reflected in the contents of the described materials. It is not used to list the occupations of the creators of the described materials, unless those occupations are significantly reflected in the materials themselves or bear some relationship to the materials. It is roughly equivalent to MARC 21 field 656.